NeedSrcPMBuff method

Determines whether a temporary buffer is needed when calling sample input methods on the IDXARGBReadPtr interface.

Syntax


BOOL retVal = object.NeedSrcPMBuff(i);

Parameters

i [in]

Type: unsigned long

Index of the specified input surface. The default value is zero.

Remarks

If the native pixel format of your transform is PMARGB32, you will call methods such as IDXARGBReadPtr::UnpackPremult to read sample data. If the format of the input surface does not match, a temporary buffer is required by the input methods. The CDXBaseNTo1::NeedDestPMBuff method tests for this condition and lets the implementer know if a buffer will need to be allocated or not.

See also

CDXBaseNTo1::InputSampleFormat

 

 

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